Add file player for testing

client/player/file_player.cpp

@@ -0,0 +1,99 @@
+/***
+    This file is part of snapcast
+    Copyright (C) 2014-2020  Johannes Pohl
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <iostream>
+
+#include "common/aixlog.hpp"
+#include "common/snap_exception.hpp"
+#include "common/str_compat.hpp"
+#include "file_player.hpp"
+
+using namespace std;
+
+static constexpr auto LOG_TAG = "FilePlayer";
+static constexpr auto kDefaultBuffer = 50ms;
+
+
+FilePlayer::FilePlayer(boost::asio::io_context& io_context, const ClientSettings::Player& settings, std::shared_ptr<Stream> stream)
+    : Player(io_context, settings, stream), timer_(io_context)
+{
+}
+
+
+FilePlayer::~FilePlayer()
+{
+    LOG(DEBUG, LOG_TAG) << "Destructor\n";
+    stop();
+}
+
+
+bool FilePlayer::needsThread() const
+{
+    return false;
+}
+
+
+void FilePlayer::requestAudio()
+{
+    auto numFrames = static_cast<uint32_t>(stream_->getFormat().msRate() * kDefaultBuffer.count());
+    auto needed = numFrames * stream_->getFormat().frameSize();
+    if (buffer_.size() < needed)
+        buffer_.resize(needed);
+
+    if (!stream_->getPlayerChunk(buffer_.data(), 100ms, numFrames))
+    {
+        // LOG(INFO, LOG_TAG) << "Failed to get chunk. Playing silence.\n";
+        memset(buffer_.data(), 0, needed);
+    }
+    else
+    {
+        adjustVolume(static_cast<char*>(buffer_.data()), numFrames);
+    }
+    loop();
+}
+
+
+void FilePlayer::loop()
+{
+    next_request_ += kDefaultBuffer;
+    auto now = std::chrono::steady_clock::now();
+    if (next_request_ < now)
+        next_request_ = now + 1ms;
+
+    timer_.expires_at(next_request_);
+    timer_.async_wait([this](boost::system::error_code ec) {
+        if (ec)
+            return;
+        requestAudio();
+    });
+}
+
+
+void FilePlayer::start()
+{
+    next_request_ = std::chrono::steady_clock::now();
+    loop();
+}
+
+
+void FilePlayer::stop()
+{
+    LOG(INFO, LOG_TAG) << "Stop\n";
+    timer_.cancel();
+}